Control device and circuit board

Abstract

A control device and a circuit board are provided. The control device can cooperate with the circuit board, and includes a ball grid array. The ball grid array includes a plurality of power balls and a plurality of ground balls, which are jointly arranged in a ball region. The power balls and the ground balls are respectively divided into a plurality of power ball groups and a plurality of ground ball groups. One of the ground ball groups includes two ground balls and is adjacent to a power ball group. A ball pitch between the two ground balls is greater than that between one of the power balls and one of the ground balls adjacent to each other. The circuit board includes a contact pad array corresponding to the ball grid array of the control device so that the control device can be disposed on the circuit board.

What is claimed is: 
     
       1. A control device comprising a ball grid array disposed at a bottom thereof, wherein the ball grid array includes a plurality of ground balls and a plurality of power balls, which are jointly arranged in a ball region, the power balls being divided into a plurality of power ball groups, and the ground balls being divided into a plurality of ground ball groups;
 wherein at least one of the ground ball groups includes two of the ground balls and is adjacent to at least one of the power ball groups, a ball pitch between the two ground balls of the at least one of the ground ball groups is greater than that between one of the power balls and one of the ground balls that are adjacent to each other; and 
 wherein the ground balls and the power balls are alternately arranged to form a first column, a second column, and a third column, all of which extend in a first direction, and a first column pitch between the first and second columns is greater than a second column pitch between the second and third columns. 
 
     
     
       2. The control device according to  claim 1 , wherein the at least one of the ground ball groups further includes a first corresponding region defined between the two ground balls, and an imaginary connection line connecting between two centers of the two ground balls extends across the first corresponding region. 
     
     
       3. The control device according to  claim 1 , wherein at least one of the power ball groups includes two of the power balls and a second corresponding region defined therebetween, and a ball pitch between the two power balls is greater than that between one of the power balls and one of the ground balls that are adjacent to each other. 
     
     
       4. The control device according to  claim 1 , wherein the power ball groups and the ground ball groups are alternately arranged in the first direction, and one of the ground ball groups is arranged between every two power ball groups. 
     
     
       5. The control device according to  claim 1 , wherein the power balls and the ground balls are arranged into a plurality of rows in a second direction, and a row pitch between any two adjacent rows is less than the first column pitch. 
     
     
       6. An electronic apparatus, comprising:
 the control device including a ball grid array disposed at a bottom thereof, wherein the ball grid array includes a plurality of ground balls and a plurality of power balls, which are jointly arranged in a ball region, the power balls being divided into a plurality of power ball groups, and the ground balls being divided into a plurality of ground ball groups; and wherein at least one of the ground ball groups includes two of the ground balls and is adjacent to at least one of the power ball groups, a ball pitch between the two ground balls of the at least one of the ground ball groups is greater than that between one of the power balls and one of the ground balls that are adjacent to each other; and 
 a circuit board, wherein the control device is disposed on the circuit board, and the circuit board includes:
 a laminated board having a first surface and a second surface opposite the first surface, wherein the laminated board includes a ground layer and a power layer which is insulated from the ground layer; and 
 a pad array disposed on the first surface, wherein the pad array includes a plurality of power pads which are electrically connected to the power layer and the power balls of the control device, respectively, and a plurality of ground pads which are electrically connected to the ground layer and the ground balls of the control device, respectively; 
 wherein the power pads and the ground pads are jointly arranged in a first predetermined region of the first surface, the power pads are divided into a plurality of power pad groups, and the ground pads are divided into a plurality of ground pad groups; and 
 wherein at least one of the ground pad groups includes two ground pads and is adjacent to one of the power pad groups, and a pad pitch between the two ground pads of the at least one of the ground pad groups is greater than a pad pitch between one of the power pads and one of the ground pads that are adjacent to each other. 
 
 
     
     
       7. The electronic apparatus according to  claim 6 , wherein the ground balls and the power balls are alternately arranged to form a first column, a second column, and a third column, all of which extend in a first direction, and a first column pitch between the first and second columns is greater than a second column pitch between the second and third columns.